A.D. 1857. № 1100.
(This Invention received Provisional Protection, but notice to proceed with the application for Letters Patent was not given within the time prescribed by the Act.)
PROVISIONAL SPECIFICATION left by Gustav Jahn at the Office of the Commissioners of Patents, with his Petition, on the 18th April 1857.
I, Gustav Jahn, of 43, Bedford Row, in the County of Middlesex, do hereby declare the nature of the Invention for “Improvements In Revolver Fire-Arms,” to be as follows:—
This Invention consists in so constructing revolver fire-arms that the charges in the chambers or short revolving barrels may be exploded by a needle fixed on a hammer or lever turning on an axis near one of its ends; this needle enters the chambers and comes in contact with an explosive material in connection with the cartridge. The hammer works underneath the barrel, its hinged or jointed end being nearest to the muzzle of the fire-arm. On the same axis with the hammer is an arm, to which the mainspring is connected by a link, and in the piece of which this arm is formed there is a notch for receiving one end of the driver, and this at its other end is jointed to an arm on the same axis with the trigger. Thus, when the trigger is drawn, the hammer is raised, and there is an incline formed on the side of the driver, which when it has raised the hammer a certain distance pushes its end out of the notch in which it rested and lets it descend, when its end enters a hole in the side of the chamber containing the cartridge and explodes it. When the hammer is again raised, an instrument in connection with the trigger axis causes the revolving chambers which are mounted on a vertical axis to move partly round, so as to bring another chamber opposite the barrel, and then the cartridge which it contains is exploded as before. In order to facilitate the putting the parts together, the trigger is made separate from the other parts, and has a square or other hole through it, and the trigger axis is made of such a shape as to fit the hole in the trigger.
The Invention also consists in charging the revolving barrels or chambers by means of a magazine, consisting of tụbes ranged round a horizontal axis mounted behind the revolving barrels; each of these tubes contains a number of cartridges, which are pressed forward by springs, and the revolving barrels after they have been discharged come in succession opposite one of the tubes of the magazine, and they are thus again supplied with cartridges.